After an incident earlier in the season, the stock turbo on my ski seized up. It seized 15mins into a ride on the water at full throttle and boost. Consequently, it took out all of the seals on the cold and hot sides of the turbo and spit oil everywhere. Since this turbo is a proprietary turbo built by IHI for Honda, it is a little on the pricy side from Honda, to the tune of $2400 at cost and cannot be rebuilt. There are not readily available bearing or seals. So, being the gear head I am, I decided lets go bigger. H20Xtreme is a shop is Miami that races Honda skis and the offer a larger (twice the cfm) turbo at a significantly lower price than OEM. They machine the exhaust housing to fit a larger IHI turbo. To make things a little more complicated, the exhaust housing is water cooled to keep heat down in the hull. So I had to keep the smallish exhaust housing and just have it machined out.

The stock turbo. It is a tiny little thing.

Cast Iron is tought to keep rust free in a wet environment.

It's a tiny little thing lol.

Here you can see the water cooled hot side.

A comparison of old vs/ new.

All ready to go with new gaskets.

Midway through install

All buttoned up.

I took it out for a shake down run. It was only running 50-51 @ 5-6lbs of boost. Stock boost is 12-13lbs. No bueno. It came up on boost no problem, came up on plane and just hit a brick wall. The good news is, with the stock turbo, 5lbs would yield high 30's to low 40's mph. So we are definitely making more power. I did some investigating and the stock boost controller solenoid was not working at all. It was stuck closed. I ordered a new solenoid that should be here today. I also have a Macsboost module that raises the boost to 16lbs that I may plug in depending on how well it runs with the new turbo. I have a feeling I am going to need more prop. Stock rev limiter is around 6500-6600. I was close to this before the bigger turbo with just the module.

This is so cool, very anxious to hear how she performs on full boost. I've been very interested in skis lately and an contemplating a purchase next year or the year after. I'm still learning a lot about the models, sea doo seems to make some very nice skis, but being the gear head that I am I don't mind buying an "underdog" and slapping a few parts on it to smoke a newer more powerful model.

Shake down run went well. Boost spiked to 19psi and then settle down to 13psi. It ran a steady 13psi for the rest of the day. I was getting 60-62 on the dream-o-meter with the seat on. I took the rear seat off thinking it may be starving for air and it ran 70-71 on the dream-o-meter. I have to figure out how to get more air under the seat I didn't plug the Macsboost module. I may get some c16 and try it this week. Overall a good day.

I took the ski out this past weekend for the last ride of the season. There were literally 5 boats on the entire lake. The water was smooth as glass and a water temp of 72°. It pulled hard. I didn't have my GPS with me, but I was seeing 6000-6100 rpm all morning long. This is on the bone stock ski with only the upgraded turbo. I never did plug the Macsboost module in. This weekend it is going back into storage unless one of the two potential buyers I have takes it off my hands.